exit($var) and die($var) should be the same type of taint sink as echo

[TysonAndre]

For https://psalm.dev/r/3c0c87ee06

Observed: No warnings about tainted input
Expected: Should warn, because the calls to exit() will echo the passed in string (e.g. in an html response)

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/3c0c87ee06

<?php // --taint-analysis
// This should be treated as the same type of sink as echo
if (rand(0, 1)) {
    exit($_GET['a']);
} else {
    die($_GET['b']);
}

Psalm output (using commit 9837a60):

No issues!